THRUST SLIDING BEARING AND COMBINATION MECHANISM OF THE THRUST SLIDING BEARING AND A PISTON ROD

摘要

A thrust sliding bearing 1 includes a synthetic resin-made bearing body 16 having a hollow cylindrical portion 4, an annular collar portion 6, an annular protruding portion 8, a tubular projecting portion 13, an engaging projecting portion 14, and an annular projecting portion 15; an annular cover 28 having a disk portion 24, a tubular portion 26, and an engaging projecting portion 27; an annular metal plate 34 having an outer disk portion 32 and an inner disk portion 33; and a thrust sliding bearing means 36 which is interposed between the bearing body 16 and an annular lower surface 35 of the outer disk portion 32 of the annular metal plate 34 and renders the annular metal plate 34 rotatable with respect to the bearing body 16 in an R direction about an axis O of the bearing body 16.

主权项

1. A thrust sliding bearing comprising:
a synthetic resin-made bearing body having a hollow cylindrical portion with a cylindrical inner peripheral surface defining a through hole, an annular collar portion integrally extending radially outwardly from a cylindrical outer peripheral surface of the hollow cylindrical portion, an annular protruding portion integrally protruding radially outwardly from a lower side of a cylindrical outer peripheral surface of the annular collar portion, a tubular projecting portion formed on an annular upper surface of the annular protruding portion and defining by a cylindrical inner peripheral surface thereof an annular outer recessed portion in cooperation with the cylindrical outer peripheral surface of the annular collar portion and the annular upper surface of the annular protruding portion, and an annular engaging projecting portion projecting radially outwardly from a cylindrical outer peripheral surface of the tubular projecting portion; an annular cover having a disk portion with an inner peripheral surface defining a through hole concentric with the through hole of said bearing body as well as an annular upper surface and an annular lower surface, a tubular portion formed integrally with the disk portion and having an inner peripheral surface, and an engaging projecting portion projecting radially inwardly from the inner peripheral surface of the tubular portion and adapted to engage the engaging projecting portion of said bearing body; an annular metal plate having a radially outwardly disposed outer disk portion having an annular upper surface coming into contact with the annular lower surface of the disk portion of said annular cover and a radially inwardly disposed inner disk portion formed integrally with the outer disk portion and disposed in the through hole defined by the inner peripheral surface of the disk portion of said annular cover; and a thrust sliding bearing means which is interposed between said bearing body and an annular lower surface of the outer disk portion of said annular metal plate and renders said annular metal plate rotatable with respect to said bearing body in a direction about an axis of said bearing body, wherein the inner disk portion has a cylindrical inner peripheral surface having a smaller diameter than a diameter of the inner peripheral surface of the hollow cylindrical portion of said bearing body and defining a through hole concentric with the both through holes, and said thrust sliding bearing means has an annular upper surface of said bearing body, an annular deep groove formed on an inner peripheral side of the annular upper surface, at least one annular shallow groove surrounding the annular deep groove and shallower in depth than the annular deep groove, and a lubricant which is filled in the annular deep groove and the annular shallow groove.